Practice Quiz in Wire and Wireless Communications System Part 56

This is the Online Practice Quiz in Wire and Wireless Communications System Part 56 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part LVI of the Online Practice Quiz

Quiz in Wire and Wireless Communications System Question 551. If a switching machine is set to accept pulses at a rate of 10 pulses per second with a 60% break, find the make interval of the switch. A. 60 ms B. 100 ms C. 40 ms D. 25 ms Question 552. Phase jitters occur at what frequency? A. less than 300 Hz B. more than 300 Hz C. more than 400 Hz D. more than 300 Hz but less than 400 Hz Question 553. A type of signaling was developed as an alternative to loop signaling. A. ear and mouth B. duplex C. loop pulsing D. interoffice calling Question 554. A telephone exchange has a subscriber loop limit of 1800 ohms, excluding the telephone instrument. What is the farthest distance, in miles, that a subscriber can be located away from the telephone exchange, if AWG 26 cable, which has a resistance of 431 ohms/loop mile, is used? A. 5.95 B. 8.18 C. 3.9 D. 4.18 Question 555. Signals that provide the routing information, such as calling and called numbers. A. routing B. calling C. controlling D. addressing Question 556. If the tuning meter reads midscale, what would this indicate in facsimile? A. average B. mistuned C. peak D. minimum Question 557. The letter of the loaded cable designation 24B88 indicates A. Spacing B. Coil inductance C. Wire gauge D. Attenuation Question 558. What emf is required across the circuit in facsimile to form a dark spot? A. 40 V B. 60 V C. 25 V D. 70 V Question 559. In a standard CCITT group, 12 channels FDM, the carrier frequency of the channel No. 1 is _______________. A. 100 kHz B. 102 kHz C. 108 kHz D. 60 kHz Question 560. With what type transmitter is fax transmitted on HF? A. AM B. FM C. PM D. SSB

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